Environmental

Radon is a naturally occurring radioactive gas that enters homes primarily through:

AContaminated drinking water only
BCracks and openings in the foundation from surrounding soil and rock✓ Correct
CBuilding materials manufactured before 1985
DAirborne transmission from nearby industrial sites

Explanation

Radon is a naturally occurring gas produced by the decay of uranium in soil and rock. It enters homes through cracks in foundations, sump pits, and other openings. North Dakota has areas with elevated radon levels.

Related North Dakota Environmental Questions

Practice More North Dakota Real Estate Questions

1,500+ questions covering all exam topics. Start free — no signup required.

Take the Free North Dakota Quiz →